Brachioradialis 228282 223064426 2008-07-02T12:05:57Z Vedran12 7322109 interwiki hr {{Muscle infobox | Name = Brachioradial muscle | Latin = musculus brachioradialis | GraySubject = 125 | GrayPage = 451 | Width = 125 | Image = Brachioradialis.png | Caption = Anterior view of muscles of the left forearm with Brachioradialis shown in blue. | Image2 = Gray417_color.PNG | Caption2 = Cross-section through the middle of the forearm. (Brachioradialis labeled at center left, sixth from the top.) | Origin = [[Lateral supracondylar ridge]] of the [[humerus]] | Insertion = Distal [[radius]] ([[Radial styloid process]])| Blood = [[radial recurrent artery]] | Nerve = [[radial nerve]] | Action = [[Flexion]] of [[forearm]] | MeshName = | MeshNumber = | DorlandsPre = m_22 | DorlandsSuf = 12548506 | }} '''Brachioradialis''' is a [[muscle]] of the [[forearm]] that acts to flex the forearm at the [[elbow]]. It is also capable of both [[pronation]] and [[supination]], depending on the position of the forearm. It is attached to the distal styloid process of the [[radius (bone)|radius]] and the [[lateral supracondylar ridge]] of the [[humerus]]. ==Action== Brachioradialis flexes the forearm at the elbow. When the forearm is pronated, the brachioradialis tends to supinate as it flexes. In a supinated position, it tends to pronate as it flexes. The brachioradialis is a stronger elbow flexor when the forearm is in a midposition between supination and pronation at the [[radioulnar joint]]. When pronated, the brachioradialis is more active during elbow flexion since the [[biceps brachii muscle|biceps brachii]] is in a mechanical disadvantage. ==Innervation== Despite the bulk of the muscle body being visible from the anterior aspect of the forearm, the brachioradialis is a posterior compartment muscle and consequently is innervated by the [[radial nerve]]. Of the muscles that receive innervation from the radial nerve, it is one of only four that receive input directly from the radial nerve. The other three are the [[triceps brachii muscle|triceps]], [[anconeus muscle|anconeus]], and [[extensor carpi radialis longus]]. (All other posterior compartment muscles that receive radial innervation are supplied by the [[deep branch of the radial nerve]].) ==Additional images== <gallery perrow="3"> Image:Gray207.png|Left humerus. Anterior view. Image:Gray213.png|Bones of left forearm. Anterior aspect. Image:Gray414.png|Front of the left forearm. Superficial muscles. Image:Gray418.png|Posterior surface of the forearm. Superficial muscles. Image:Gray525.png|The brachial artery. Image:Gray527.png|The radial and ulnar arteries. Image:Gray528.png|Ulnar and radial arteries. Deep view. Image:Nerves_of_the_left_upper_extremity.gif|Nerves of the left upper extremity. </gallery> ==External links== * {{MuscleLoyola|brds}} * {{MuscleUWash|brachioradialis}} * {{SUNYAnatomyFigs|07|01|09}} - "Transverse section through the left arm just proximal to the elbow." * {{SUNYAnatomyFigs|07|03|07}} - "Superficial muscles of the anterior (flexor) compartment of the left forearm." * {{SUNYAnatomyFigs|09|02|02}} - "Superficial muscles of the posterior (extensor) compartment of the left forearm." * {{NormanAnatomy|lesson5musofpostforearm}} {{Muscles of upper limb}} [[Category:Muscles of the upper limb]] [[ar:عضلة عضدية كعبرية]] [[ca:Múscul braquioradial]] [[de:Musculus brachioradialis]] [[es:Supinador largo]] [[fr:Muscle brachioradial]] [[he:שריר הזרוע והחישור]] [[hr:Nadlaktičnopalčani mišić]] [[hu:Musculus brachioradialis]] [[nl:Musculus brachioradialis]] [[ja:腕橈骨筋]] [[pl:Mięsień ramienno-promieniowy]] [[pt:Músculo braquiorradial]] [[sl:Brahioradialna mišica]] [[sv:Brachioradialis]] [[th:กล้ามเนื้อบราคิโอเรเดียลิส]]